687430 has 8 divisors (see below), whose sum is σ = 1237392. Its totient is φ = 274968.

The previous prime is 687413. The next prime is 687431. The reversal of 687430 is 34786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34362 + ... + 34381.

It is an arithmetic number, because the mean of its divisors is an integer number (154674).

2⁶⁸⁷⁴³⁰ is an apocalyptic number.

687430 is a deficient number, since it is larger than the sum of its proper divisors (549962).

687430 is a wasteful number, since it uses less digits than its factorization.

687430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68750.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 687430 is about 829.1139849261. The cubic root of 687430 is about 88.2557128344.

The spelling of 687430 in words is "six hundred eighty-seven thousand, four hundred thirty".